Diving Officer, 1.O

The
diving officer, also named 1. O was responsible for the diving calculations.
He supervised the diving through the diving console in the control room. He
was also in charge of manoeuvring, safety and torpedo.

He
was serving as the officer in charge and was alternating in this role with
the 2:nd officer.

The
main responsibility for the 2:nd officer, 2. O, was the combat control
executed from the combat centre-control room. The 2. O responsibility was
also communication, sonar and mine service.

U3 Control room port, officers at the diving console corner, in the front helmsman and planesman.
Photo U3 archives.